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Recent content by Japo

  1. Japo

    dependence of peak resolution on moving average

    Thanks Cloa, I'm sorry I didn't notice that. But I think I'll consider this solved.
  2. Japo

    dependence of peak resolution on moving average

    Thanks Greg. I had reached a similar conclusion, when I verified that the moving average added an equal delay to the upwards and downwards slopes, so it doesn't widen the peak (when this isn't ridiculously thin in comparison to the moving average). The resolution is not affected when the maximum...
  3. Japo

    Young's modulus height dependent

    So your material is strongly non linear... So? Do you have any reason to expect linearity from such a material?
  4. Japo

    Sustained torsional oscillation

    I agree with Electricpete, the first usual suspect you should look at is resonance. Check that the excitation causing this has a frequency component close to the natural frequency of the vibration mode that's responding. I'm assuming of course that you have no control over this excitation, but...
  5. Japo

    buckling of horizontally mounted column

    The qualitative effect of bending composed with buckling is of course that any compression load will cause additional bending even before the buckling limit is reached, because of the torque caused by the load on the previous deformation. But if you plot buckling displacement versus compression...
  6. Japo

    Saving 2D drawing as ***.DWG

    Both DWG and DXF will have the broadest support from any CAD program, they're both originally creations of AutoCAD. The difference is that DXF is open, so programs other than Autodesk's support it with no glitches, whereas their support of DWG is somewhat of a crack that Autodesk likes to fight...
  7. Japo

    Creating a Graphical Interface

    Start with http://msdn.microsoft.com/en-us/library/system.windows.forms.picturebox.aspx if you meant .NET. If you meant VB 6, http://msdn.microsoft.com/en-us/library/aa267232(VS.60).aspx
  8. Japo

    dependence of peak resolution on moving average

    Hello, I didn't know where to post, the exact topic would be signal processing, this is the closest forum I've found. For those who aren't familiar with the definition, the resolution I'm talking about would concern peaks (my case is time domain but could be other), typically more or less...
  9. Japo

    removal of nitrates from hydrochloric acid

    Thanks a lot all, I hadn't thought about physical separation or even asking the supplier (Sigma-Aldrich), and I didn't know about sulfamic acid... I'm passing your suggestions along to the chemists. (We're still giving distillation a go, correcting a few things. Last thing, we hadn't considered...
  10. Japo

    convective heat transfer coefficient

    Some more notes, that I used a while ago: http://www.cheresources.com/convection.shtml You can find this and more in many books of course.
  11. Japo

    removal of nitrates from hydrochloric acid

    Hello, We're trying to detect trace nitrates and we've found (unequivocally we believe) that an ultra-pure HCl 37% solution is contributing a certain amount of nitrates. According to our approximate quantization the amount may be within the limit promised on the label (~1 mg/l), but in our...
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